crypto/evp/p_lib.c

   1 /* crypto/evp/p_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/bn.h>
  62 #include <openssl/err.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/evp.h>
  65 #include <openssl/asn1_mac.h>
  66 #include <openssl/x509.h>
  67 #ifndef OPENSSL_NO_RSA
  68 #include <openssl/rsa.h>
  69 #endif
  70 #ifndef OPENSSL_NO_DSA
  71 #include <openssl/dsa.h>
  72 #endif
  73 #ifndef OPENSSL_NO_DH
  74 #include <openssl/dh.h>
  75 #endif
  76
  77 static void EVP_PKEY_free_it(EVP_PKEY *x);
  78
  79 int EVP_PKEY_bits(EVP_PKEY *pkey)
  80         {
  81         if (0)
  82                 return 0;
  83 #ifndef OPENSSL_NO_RSA
  84         else if (pkey->type == EVP_PKEY_RSA)
  85                 return(BN_num_bits(pkey->pkey.rsa->n));
  86 #endif
  87 #ifndef OPENSSL_NO_DSA
  88         else if (pkey->type == EVP_PKEY_DSA)
  89                 return(BN_num_bits(pkey->pkey.dsa->p));
  90 #endif
  91 #ifndef OPENSSL_NO_EC
  92         else if (pkey->type == EVP_PKEY_EC)
  93                 {
  94                 BIGNUM *order = BN_new();
  95                 const EC_GROUP *group;
  96                 int ret;
  97
  98                 if (!order)
  99                         {
 100                         ERR_clear_error();
 101                         return 0;
 102                         }
 103                 group = EC_KEY_get0_group(pkey->pkey.ec);
 104                 if (!EC_GROUP_get_order(group, order, NULL))
 105                         {
 106                         ERR_clear_error();
 107                         return 0;
 108                         }
 109
 110                 ret = BN_num_bits(order);
 111                 BN_free(order);
 112                 return ret;
 113                 }
 114 #endif
 115         return(0);
 116         }
 117
 118 int EVP_PKEY_size(EVP_PKEY *pkey)
 119         {
 120         if (pkey == NULL)
 121                 return(0);
 122 #ifndef OPENSSL_NO_RSA
 123         if (pkey->type == EVP_PKEY_RSA)
 124                 return(RSA_size(pkey->pkey.rsa));
 125         else
 126 #endif
 127 #ifndef OPENSSL_NO_DSA
 128                 if (pkey->type == EVP_PKEY_DSA)
 129                 return(DSA_size(pkey->pkey.dsa));
 130 #endif
 131 #ifndef OPENSSL_NO_ECDSA
 132                 if (pkey->type == EVP_PKEY_EC)
 133                 return(ECDSA_size(pkey->pkey.ec));
 134 #endif
 135
 136         return(0);
 137         }
 138
 139 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
 140         {
 141 #ifndef OPENSSL_NO_DSA
 142         if (pkey->type == EVP_PKEY_DSA)
 143                 {
 144                 int ret=pkey->save_parameters;
 145
 146                 if (mode >= 0)
 147                         pkey->save_parameters=mode;
 148                 return(ret);
 149                 }
 150 #endif
 151 #ifndef OPENSSL_NO_EC
 152         if (pkey->type == EVP_PKEY_EC)
 153                 {
 154                 int ret = pkey->save_parameters;
 155
 156                 if (mode >= 0)
 157                         pkey->save_parameters = mode;
 158                 return(ret);
 159                 }
 160 #endif
 161         return(0);
 162         }
 163
 164 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 165         {
 166         if (to->type != from->type)
 167                 {
 168                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
 169                 goto err;
 170                 }
 171
 172         if (EVP_PKEY_missing_parameters(from))
 173                 {
 174                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
 175                 goto err;
 176                 }
 177 #ifndef OPENSSL_NO_DSA
 178         if (to->type == EVP_PKEY_DSA)
 179                 {
 180                 BIGNUM *a;
 181
 182                 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
 183                 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
 184                 to->pkey.dsa->p=a;
 185
 186                 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
 187                 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
 188                 to->pkey.dsa->q=a;
 189
 190                 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
 191                 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
 192                 to->pkey.dsa->g=a;
 193                 }
 194 #endif
 195 #ifndef OPENSSL_NO_EC
 196         if (to->type == EVP_PKEY_EC)
 197                 {
 198                 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
 199                 if (group == NULL)
 200                         goto err;
 201                 if (EC_KEY_set_group(to->pkey.ec, group) == 0)
 202                         goto err;
 203                 EC_GROUP_free(group);
 204                 }
 205 #endif
 206         return(1);
 207 err:
 208         return(0);
 209         }
 210
 211 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
 212         {
 213 #ifndef OPENSSL_NO_DSA
 214         if (pkey->type == EVP_PKEY_DSA)
 215                 {
 216                 DSA *dsa;
 217
 218                 dsa=pkey->pkey.dsa;
 219                 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 220                         return(1);
 221                 }
 222 #endif
 223 #ifndef OPENSSL_NO_EC
 224         if (pkey->type == EVP_PKEY_EC)
 225                 {
 226                 if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
 227                         return(1);
 228                 }
 229 #endif
 230
 231         return(0);
 232         }
 233
 234 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 235         {
 236 #ifndef OPENSSL_NO_DSA
 237         if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
 238                 {
 239                 if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 240                         BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 241                         BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 242                         return(0);
 243                 else
 244                         return(1);
 245                 }
 246 #endif
 247 #ifndef OPENSSL_NO_EC
 248         if (a->type == EVP_PKEY_EC && b->type == EVP_PKEY_EC)
 249                 {
 250                 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
 251                                *group_b = EC_KEY_get0_group(b->pkey.ec);
 252                 if (EC_GROUP_cmp(group_a, group_b, NULL))
 253                         return 0;
 254                 else
 255                         return 1;
 256                 }
 257 #endif
 258         return(-1);
 259         }
 260
 261 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 262         {
 263         if (a->type != b->type)
 264                 return -1;
 265
 266         if (EVP_PKEY_cmp_parameters(a, b) == 0)
 267                 return 0;
 268
 269         switch (a->type)
 270                 {
 271 #ifndef OPENSSL_NO_RSA
 272         case EVP_PKEY_RSA:
 273                 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
 274                         || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
 275                         return 0;
 276                 break;
 277 #endif
 278 #ifndef OPENSSL_NO_DSA
 279         case EVP_PKEY_DSA:
 280                 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
 281                         return 0;
 282                 break;
 283 #endif
 284 #ifndef OPENSSL_NO_EC
 285         case EVP_PKEY_EC:
 286                 {
 287                 int  r;
 288                 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
 289                 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
 290                                *pb = EC_KEY_get0_public_key(b->pkey.ec);
 291                 r = EC_POINT_cmp(group, pa, pb, NULL);
 292                 if (r != 0)
 293                         {
 294                         if (r == 1)
 295                                 return 0;
 296                         else
 297                                 return -2;
 298                         }
 299                 }
 300                 break;
 301 #endif
 302 #ifndef OPENSSL_NO_DH
 303         case EVP_PKEY_DH:
 304                 return -2;
 305 #endif
 306         default:
 307                 return -2;
 308                 }
 309
 310         return 1;
 311         }
 312
 313 EVP_PKEY *EVP_PKEY_new(void)
 314         {
 315         EVP_PKEY *ret;
 316
 317         ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
 318         if (ret == NULL)
 319                 {
 320                 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
 321                 return(NULL);
 322                 }
 323         ret->type=EVP_PKEY_NONE;
 324         ret->references=1;
 325         ret->pkey.ptr=NULL;
 326         ret->attributes=NULL;
 327         ret->save_parameters=1;
 328         return(ret);
 329         }
 330
 331 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
 332         {
 333         if (pkey == NULL) return(0);
 334         if (pkey->pkey.ptr != NULL)
 335                 EVP_PKEY_free_it(pkey);
 336         pkey->type=EVP_PKEY_type(type);
 337         pkey->save_type=type;
 338         pkey->pkey.ptr=key;
 339         return(key != NULL);
 340         }
 341
 342 #ifndef OPENSSL_NO_RSA
 343 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
 344 {
 345         int ret = EVP_PKEY_assign_RSA(pkey, key);
 346         if(ret)
 347                 RSA_up_ref(key);
 348         return ret;
 349 }
 350
 351 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
 352         {
 353         if(pkey->type != EVP_PKEY_RSA) {
 354                 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
 355                 return NULL;
 356         }
 357         RSA_up_ref(pkey->pkey.rsa);
 358         return pkey->pkey.rsa;
 359 }
 360 #endif
 361
 362 #ifndef OPENSSL_NO_DSA
 363 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
 364 {
 365         int ret = EVP_PKEY_assign_DSA(pkey, key);
 366         if(ret)
 367                 DSA_up_ref(key);
 368         return ret;
 369 }
 370
 371 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
 372         {
 373         if(pkey->type != EVP_PKEY_DSA) {
 374                 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
 375                 return NULL;
 376         }
 377         DSA_up_ref(pkey->pkey.dsa);
 378         return pkey->pkey.dsa;
 379 }
 380 #endif
 381
 382 #ifndef OPENSSL_NO_EC
 383
 384 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
 385 {
 386         int ret = EVP_PKEY_assign_EC_KEY(pkey,key);
 387         if (ret)
 388                 EC_KEY_up_ref(key);
 389         return ret;
 390 }
 391
 392 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
 393 {
 394         if (pkey->type != EVP_PKEY_EC)
 395         {
 396                 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
 397                 return NULL;
 398         }
 399         EC_KEY_up_ref(pkey->pkey.ec);
 400         return pkey->pkey.ec;
 401 }
 402 #endif
 403
 404
 405 #ifndef OPENSSL_NO_DH
 406
 407 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
 408 {
 409         int ret = EVP_PKEY_assign_DH(pkey, key);
 410         if(ret)
 411                 DH_up_ref(key);
 412         return ret;
 413 }
 414
 415 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
 416         {
 417         if(pkey->type != EVP_PKEY_DH) {
 418                 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
 419                 return NULL;
 420         }
 421         DH_up_ref(pkey->pkey.dh);
 422         return pkey->pkey.dh;
 423 }
 424 #endif
 425
 426 int EVP_PKEY_type(int type)
 427         {
 428         switch (type)
 429                 {
 430         case EVP_PKEY_RSA:
 431         case EVP_PKEY_RSA2:
 432                 return(EVP_PKEY_RSA);
 433         case EVP_PKEY_DSA:
 434         case EVP_PKEY_DSA1:
 435         case EVP_PKEY_DSA2:
 436         case EVP_PKEY_DSA3:
 437         case EVP_PKEY_DSA4:
 438                 return(EVP_PKEY_DSA);
 439         case EVP_PKEY_DH:
 440                 return(EVP_PKEY_DH);
 441         case EVP_PKEY_EC:
 442                 return(EVP_PKEY_EC);
 443         default:
 444                 return(NID_undef);
 445                 }
 446         }
 447
 448 void EVP_PKEY_free(EVP_PKEY *x)
 449         {
 450         int i;
 451
 452         if (x == NULL) return;
 453
 454         i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
 455 #ifdef REF_PRINT
 456         REF_PRINT("EVP_PKEY",x);
 457 #endif
 458         if (i > 0) return;
 459 #ifdef REF_CHECK
 460         if (i < 0)
 461                 {
 462                 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
 463                 abort();
 464                 }
 465 #endif
 466         EVP_PKEY_free_it(x);
 467         if (x->attributes)
 468                 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
 469         OPENSSL_free(x);
 470         }
 471
 472 static void EVP_PKEY_free_it(EVP_PKEY *x)
 473         {
 474         switch (x->type)
 475                 {
 476 #ifndef OPENSSL_NO_RSA
 477         case EVP_PKEY_RSA:
 478         case EVP_PKEY_RSA2:
 479                 RSA_free(x->pkey.rsa);
 480                 break;
 481 #endif
 482 #ifndef OPENSSL_NO_DSA
 483         case EVP_PKEY_DSA:
 484         case EVP_PKEY_DSA2:
 485         case EVP_PKEY_DSA3:
 486         case EVP_PKEY_DSA4:
 487                 DSA_free(x->pkey.dsa);
 488                 break;
 489 #endif
 490 #ifndef OPENSSL_NO_EC
 491         case EVP_PKEY_EC:
 492                 EC_KEY_free(x->pkey.ec);
 493                 break;
 494 #endif
 495 #ifndef OPENSSL_NO_DH
 496         case EVP_PKEY_DH:
 497                 DH_free(x->pkey.dh);
 498                 break;
 499 #endif
 500                 }
 501         }
 502